EP0944200A3 - Procédé et dispositif de modulation adaptatif - Google Patents

Procédé et dispositif de modulation adaptatif Download PDF

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Publication number
EP0944200A3
EP0944200A3 EP99104053A EP99104053A EP0944200A3 EP 0944200 A3 EP0944200 A3 EP 0944200A3 EP 99104053 A EP99104053 A EP 99104053A EP 99104053 A EP99104053 A EP 99104053A EP 0944200 A3 EP0944200 A3 EP 0944200A3
Authority
EP
European Patent Office
Prior art keywords
modulation level
likelihood function
variance
mean
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99104053A
Other languages
German (de)
English (en)
Other versions
EP0944200B1 (fr
EP0944200A2 (fr
Inventor
Makoto Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0944200A2 publication Critical patent/EP0944200A2/fr
Publication of EP0944200A3 publication Critical patent/EP0944200A3/fr
Application granted granted Critical
Publication of EP0944200B1 publication Critical patent/EP0944200B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0032—Without explicit signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0059—Convolutional codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
EP99104053A 1998-03-19 1999-03-17 Procédé et dispositif de modulation adaptatif Expired - Lifetime EP0944200B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7079798 1998-03-19
JP07079798A JP3741858B2 (ja) 1998-03-19 1998-03-19 適応変調方式

Publications (3)

Publication Number Publication Date
EP0944200A2 EP0944200A2 (fr) 1999-09-22
EP0944200A3 true EP0944200A3 (fr) 2006-05-24
EP0944200B1 EP0944200B1 (fr) 2009-06-17

Family

ID=13441903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104053A Expired - Lifetime EP0944200B1 (fr) 1998-03-19 1999-03-17 Procédé et dispositif de modulation adaptatif

Country Status (4)

Country Link
US (1) US6359934B1 (fr)
EP (1) EP0944200B1 (fr)
JP (1) JP3741858B2 (fr)
DE (1) DE69940991D1 (fr)

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EP1128592A3 (fr) 2000-02-23 2003-09-17 NTT DoCoMo, Inc. AMRC multiporteuse et estimation de canal
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DE60038369T2 (de) 2000-06-28 2009-03-05 Sony Deutschland Gmbh Vorrichtung zur modulationserkennung
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AU2002226927A1 (en) 2000-11-15 2002-05-27 Ensemble Communications, Inc. Improved frame structure for a communication system using adaptive modulation
US7477702B2 (en) * 2000-11-30 2009-01-13 Nokia Mobile Phones Limited Apparatus, and associated method, for selecting a switching threshold for a transmitter utilizing adaptive modulation techniques
US6940915B2 (en) * 2000-11-30 2005-09-06 Nokia Mobile Phones Ltd. Adaptive learning method and system to adaptive modulation
US7283583B2 (en) * 2001-01-11 2007-10-16 Tioga Technologies, Inc. Adaptive rate transmission with dual noise margins
US8009667B1 (en) 2001-01-16 2011-08-30 Wi—LAN, Inc. Packing source data packets into transporting packets with fragmentation
JP3589992B2 (ja) 2001-02-27 2004-11-17 松下電器産業株式会社 通信装置及び伝送方式選択方法
EP1273145A1 (fr) 2001-03-13 2003-01-08 Matsushita Electric Industrial Co., Ltd. Procede et systeme de detection aveugle de types de modulation
JP4016647B2 (ja) * 2001-05-17 2007-12-05 日本電気株式会社 移動通信システム、基地局、移動局及びそれらに用いるしきい値設定方法並びにそのプログラム
GB0124321D0 (en) * 2001-10-10 2001-11-28 Nokia Corp Modulation determination
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JP3555943B2 (ja) * 2002-02-27 2004-08-18 松下電器産業株式会社 無線受信装置、変調方式判定方法および符号化方式判定方法
DE10214117B4 (de) * 2002-03-28 2005-06-23 Siemens Ag Adaptive Modulation und andere Erweiterungen der physikalischen Schicht in Mehrfachzugriffsystemen
US7418240B2 (en) * 2002-05-03 2008-08-26 Broadcom Corporation Dynamic adaptation of impaired RF communication channels in a communication system
US7016697B2 (en) * 2002-10-29 2006-03-21 Qualcomm Incorporated Controlling multiple modems in a wireless terminal using dynamically varying modem transmit power limits
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US7020484B2 (en) * 2002-10-29 2006-03-28 Qualcomm Incorporated Controlling multiple modems in a wireless terminal using energy-per-bit determinations
EP1568141B1 (fr) * 2002-11-20 2009-09-16 Interdigital Technology Corporation Systeme et procede de communication utilisant une estimation de rapport signal sur bruit pour la mise a l'echelle dans le traitement de signaux de communication sans fil reçus
US7012346B2 (en) * 2003-03-07 2006-03-14 Resmed Limited Low profile d.c. brushless motor for an impeller mechanism or the like
KR101133632B1 (ko) 2003-07-31 2012-04-10 파나소닉 주식회사 무선 송신 장치 및 변조 방식의 선택 방법
JP2005057670A (ja) * 2003-08-07 2005-03-03 Toshiba Corp デジタル通信装置及びデジタル通信システム
JP4269858B2 (ja) 2003-09-10 2009-05-27 株式会社日立製作所 適応変復調方式及び無線通信システム
KR100557191B1 (ko) * 2003-12-01 2006-03-03 삼성전자주식회사 광대역 무선 접속 통신 시스템에서 셀 커버 영역에 따라 변조 방식을 가변적으로 전환할 수 있는 소프트 변조 전환방법
JP4263626B2 (ja) 2004-01-13 2009-05-13 株式会社ルネサステクノロジ 通信装置、通信システム、及び通信方法
US7684521B2 (en) * 2004-02-04 2010-03-23 Broadcom Corporation Apparatus and method for hybrid decoding
CN101895504A (zh) * 2004-04-30 2010-11-24 夏普株式会社 无线通信系统
KR100587978B1 (ko) * 2004-11-29 2006-06-08 한국전자통신연구원 위성통신시스템에서 블라인드 변조 분류 장치 및 그 방법
JP4583440B2 (ja) * 2005-02-08 2010-11-17 シャープ株式会社 通信端末装置および通信システム
KR100636813B1 (ko) * 2005-02-21 2006-10-20 삼성전자주식회사 송신 신호 추정 장치 및 방법
CN100512260C (zh) * 2005-07-08 2009-07-08 中兴通讯股份有限公司 时分同步码分多址系统中16qam的解调方法
US8553811B2 (en) 2009-06-03 2013-10-08 Nec Corporation Likelihood value calculation device, likelihood value calculation method, and radio system
US9234307B2 (en) * 2009-07-27 2016-01-12 Lg Electronics Inc. Control method of a laundry machine
JP2012034165A (ja) * 2010-07-30 2012-02-16 Mega Chips Corp 通信装置および通信システム
US8699630B2 (en) * 2010-10-27 2014-04-15 Silicon Laboratories Inc. Systems and methods for handling data rate changes within a packet or frame
US8665986B2 (en) * 2011-09-06 2014-03-04 Samsung Electronics Co., Ltd. Communication system with modulation classifier and method of operation thereof
US10038497B2 (en) * 2013-12-18 2018-07-31 Northrup Grumman Systems Corporation Optical transceiver with variable data rate and sensitivity control
US9413584B2 (en) 2014-04-07 2016-08-09 University Of Utah Research Foundation Blind phase-shift keying (PSK) and quadrature amplitude modulation (QAM) identification
CN110061761B (zh) * 2018-01-19 2022-01-14 华为技术有限公司 信号均衡方法及装置、光接收机
US11418422B1 (en) * 2021-02-08 2022-08-16 Mellanox Technologies, Ltd. Received-signal rate detection

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US5636250A (en) * 1994-12-13 1997-06-03 Hitachi America, Ltd. Automatic VSB/QAM modulation recognition method and apparatus

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Also Published As

Publication number Publication date
EP0944200B1 (fr) 2009-06-17
US6359934B1 (en) 2002-03-19
EP0944200A2 (fr) 1999-09-22
DE69940991D1 (fr) 2009-07-30
JPH11275164A (ja) 1999-10-08
JP3741858B2 (ja) 2006-02-01

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